Processing unknown HTTP sessions
Unknown HTTP sessions are HTTP sessions that do not comply with HTTP 0.9, 1.0, or 1.1. From the CLI, use the following command to specify how a rule handles such HTTP sessions.
config wanopt profile
edit default
config http
set status enable
set unknown-http-version {best-effort | reject | tunnel}
end
To assume that all HTTP sessions accepted by the rule comply with HTTP 0.9, 1.0, or 1.1, select best-effort. If a session uses a different HTTP version, WAN optimization may not parse it correctly. As a result, the FortiGate unit may stop forwarding the session and the connection may be lost. To reject HTTP sessions that do not use HTTP 0.9, 1.0, or 1.1, select reject.
To pass HTTP sessions that do not use HTTP 0.9, 1.0, or 1.1, but without applying HTTP protocol optimization, byte-caching, or web caching, you can also select tunnel. TCP protocol optimization is applied to these HTTP sessions.